JPH0511209Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an omnidirectional roller that can move a loaded article in any direction on a plane.

(Prior art) As shown in FIGS. 2 and 3, an omnidirectional roller has a pair of rotating bodies 1, 1 with three barrel-shaped rollers 3 pivotally supported at equal intervals on the outer periphery, and a single cylindrical shaft. 5, the bearings 8 are fitted on the outside of the cylindrical shaft 5 of each rotating body 1, and both bearings 8
The shaft 7 is inserted through the shaft 7.

The omnidirectional rollers are disposed with both ends of the shaft 7 supported by brackets 9 arranged on the article conveyance path, and the article can be conveyed in any direction by sliding on the rollers 3.

(Problem to be solved) The above omnidirectional roller has the inner surface of the cylinder shaft 5 and the shaft 7.
When a bending force is applied to the cylinder shaft 5 due to the load acting on the rollers in all directions, the cylinder shaft 5
was bent, and the rotating body 1 almost fell over, making it difficult to rotate smoothly. Also, when the load was large, the cylindrical shaft 5 was damaged, causing problems in durability.

(Means for solving the problem) The present invention increases the bending strength of the cylinder shaft 5 by press-fitting a reinforcing sleeve 6 into the center of the cylinder shaft 5,
This paper reveals an omnidirectional roller that can solve the above problem.

The omnidirectional roller of the present invention consists of a pair of rotating bodies 1, 1.
A cylindrical shaft 5 is fitted across the shaft holes 20, 20, a reinforcing sleeve 6 is press-fitted into the center of the inner surface of the cylindrical shaft, and a shaft 7 is slidably fitted into the sleeve 6.

(Functions and Effects) The reinforcing sleeve 6 increases the bending strength of the cylinder shaft 5, and since the sleeve 6 is slidably fitted onto the shaft 7, the bending load acting on the cylinder shaft 5 is transferred to the cylinder shaft 5. It is received by the shaft 5, the reinforcing sleeve 6, and the shaft 7, and the deflection of the cylinder shaft 5 can be suppressed. Therefore, the rotating body 1 can be prevented from falling down, the rotating body can be rotated smoothly, and the durability of the cylinder shaft 5 can be improved.

(Example) As shown in Fig. 2, the pair of rotating bodies 1, 1 constituting the omnidirectional roller 3 includes three barrel-shaped rollers 3 arranged at equal intervals on the outer periphery of a main body 2 made of aluminum die-casting. It consists of

The main body 2 has a shaft hole 20 formed on the outer periphery of the boss 21.
Ribs 22 are protruded at intervals of 120°, and the ribs 2
A support piece 23 that is bifurcated is formed at the tip of 2.

The outer end side of the boss 21 and each rib 22 are flange 26
Furthermore, in the embodiment, a reinforcing rib 22 is formed which spans between the bifurcated support pieces 23 and is continuous with the flange 26.

Three meshing protrusions 24 of 60° arc are protruded at equal intervals on the inner end of the boss 21, with a 60° gap between adjacent protrusions.
A circular arc recess 25 is formed.

A barrel roller 3 is inserted between adjacent ribs 22,
The roller 3 is rotatably supported by the main body 2 by a support shaft 4 passing through the roller 3 and support pieces 23 on both sides of the roller 3.

The pair of rotating bodies 1 are formed to have the same shape, and the phases of each rotating body 1 are shifted by 60°, so that the convex part 24 of the boss 21 of one rotary body 1 is set to the convex part 25 of the boss 21 of the other rotary body 1.
The shaft holes 20 of both rotating bodies 1, 1
The cylindrical shaft 5 is fitted in series to 20.

The cylindrical shaft 5 is formed to be shorter than the length between the outer ends of both the rotary bodies 1, and the cylindrical shaft is fitted into both the rotary bodies with an equal length left on the outer end side of the shaft hole of the rotary bodies.

A bearing 8 is fitted into the outer end side of the shaft hole 20 of each rotating body 1, and the shaft 7 is provided passing through both bearings 8.

The bearing 8 is an Oiles bush or press bearing.

Thin threaded shafts 71, 71 are formed at both ends of the shaft.

A feature of the present invention is that a reinforcing sleeve 6 is press-fitted into the center of the inner surface of the cylindrical shaft 5, and a shaft 7 is slidably fitted into the sleeve 6.

The wall thickness of the sleeve 6 is slightly larger than that of the cylinder shaft 5, and the length of the sleeve 6 is about 1/3 of the length of the cylinder shaft 5.

As shown in FIG. 1, a notch 92 is provided at the upper end of both support plates 91, 91 of the U-shaped bracket 9.
The screw shafts 71, 71 of the shaft 7 are fitted into the notches 92, and tightened and fixed with nuts.

However, in the omnidirectional roller of the present invention, the bending strength of the cylindrical shaft 5 is increased by the reinforcing sleeve 6, and since the sleeve 6 is slidably fitted to the shaft 7, the bending strength acting on the cylindrical shaft 5 is increased. Since the load is also borne by the shaft 7, durability is greatly improved, deflection of the cylindrical shaft 5 can be suppressed, and the rotating body 1 can be rotated smoothly.

When implementing the present invention, the cylindrical shaft 5 is press-fitted into the rotating body 1, the shaft hole of the sleeve 6 is formed into a square hole, the part of the shaft 7 into which the sleeve 6 fits is made into a square shaft, and the shaft 7 is connected to the rotating device. By rotationally driving, the rotating body 1 can also be forced to rotate.

The present invention is not limited to the above embodiments,
Various modifications are possible within the scope of the claims for utility model registration.

[Brief explanation of drawings]

Figure 1 is a sectional view of the omnidirectional roller of the present invention, Figure 2 is a sectional view of the omnidirectional roller of the present invention;
The figure is an exploded perspective view of the omnidirectional roller, and FIG. 3 is a perspective view of the omnidirectional roller. 1...Rotating body, 3...Roller, 5...Cylinder shaft, 6
...sleeve, 6...shaft.

Claims (1)

[Scope of utility model registration request] A pair of rotating bodies 1 each having a plurality of barrel-shaped rollers 3 disposed at equal intervals on the outer periphery in a plane perpendicular to the shaft center are aligned concentrically on a cylindrical shaft 5 with a phase shift. In the omnidirectional roller 3, in which the shaft 7 is provided by passing through the bearings 8, 8 fitted to the outer ends of the shaft holes 20, 20, a reinforcing sleeve 6 is press-fitted into the center of the inner surface of the cylindrical shaft 5, and the sleeve 6 is an omnidirectional roller that is slidably fitted onto the shaft 7.